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Did you know?
Asthma cases in Americans are about 75% higher today than they were in 1980.
Did you know?
When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
Did you know?
Everyone has one nostril that is larger than the other.
Did you know?
The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.
Did you know?
The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.